Stylographic pen with disposable ink reservoir

ABSTRACT

A stylographic pen of the type encompassing an ink reservoir communicant with a tubular writing pen tip, particularly the improvement consisting of a disposable reservoir reciprocable within the pen barrel, while venting the reservoir and cleaning the tubular writing tip with a cleaning wire.

United States Patent lnventor Edward Bok 7348 Lee Hwy. Apt. 201, Falls Church, Va. 22046 Appl No. 9,369

Filed Feb. 6, 1970 Patented Aug. 24, 1971 STYLOGRAPHIC PEN WITH DlSPOSABLE INK RESERVOIR 12 Claims, 20 Drawing Figs.

Int. Cl 843k 1/10 Field of Search 401 /258260, 187, 132-5 {56] References Cited UNITED STATES PATENTS 3,457,019 7/1969 Blanchard 3,486,830 12/1969 Bok 3,535,049 10/1970 Bok FOREIGN PATENTS 167,758 2/1951 Austria Primary Examiner- Lawrence Charles Attorney-David H. Semmes ABSTRACT: A stylographic pen of the type encompassing an ink reservoir communicant with a tubular writing pen tip, particularly the improvement consisting of a disposable reservoir reciprocable within the pen barrel, while venting the reservoir and cleaning the tubular writing tip with a cleaning wire.

STYLOGRAPHIC PEN WITH DISPOSABLE INK RESERVOIR 1 BACKGROUND OF THE INVENTION SUMMARY OF THE INVENTION According tothe present invention, a vented ink reservoir is reciprocably enclosed in the pen barrel, and a vent-sealing means is located between this ink reservoir and the barrel. The ink reservoir may have an upper vent, through which vent the ink reservoir is communicant with the inside of the barrel. A side vent opening is located in the wall of the barrel. An upward movement of the ink reservoir against the downward thrust of a spring means results in the sealing of the side vent by means of this reservoir and a pressure buildup in the ink reservoir. The barrel has an open lower end, whereby the ink reservoir reciprocates within this barrel opening upwardly to I its pressurized and sealed position within the barrel. Also, a

removable lock means is attached to the ink reservoir.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is in part, an enlarged vertical sectional view and side ielevation of the pen according to the invention, with the side vent sealed by means of a removable pen cap;

FIG. 2 is a transverse sectional view of the pen, taken along section line 2-2 of FIG. 1;

FIG. 3 is a transverse sectional view of the pen, taken along section line3-3 of FIG. 1;

FIG. 4 is a transverse sectional view of the pen, taken along section line 4 4 ofFIG. 1;

FIG. 5 is a vertical sectional view of the lower end of the pen, according to FIG. 1 and whereby the ink reservoir is in lowest position with an open side vent;

FIG. 6 is a fragmentary vertical sectional view of the lower end of the pen during assembly by upward urging of the ink reservoir into the pen barrel against the downward thrust of the lock shoulder;

FIG. 7 is a fragmentary vertical sectional view of the lower end of the pen with the ink reservoirbeing removed out of the pen barrel; FIG. 8 is a fragmentary vertical sectional view of a modified seal;

FIG. 9 is a fragmentary vertical sectional view of a modified pen with the cleaning wire extension protruding independently and apart from the upper vent into the barrel chamber;

FIG. 10 is in part, an enlarged vertical sectional view and side elevation of a modified pen with a sealing ring positioned exteriorly of the ink reservoir;

FIG. 11 is a transverse sectional view of the pen, taken along section line 11-11 of FIG. 10;,

FIG. 12 is an enlarged fragmentary vertical sectional view of the pen according to FIG. 10 with open side vent;

FIG. 13 is an enlarged fragmentary vertical sectional view of the pen according to FIG. 10, with sealedside vent;

FIG. 14 is an enlarged fragmentary vertical sectional view of the pen according to FIG. 10, withthe ink reservoir being removed from the barrel;

FIG. 15 is an enlarged fragmentary, vertical sectional view of a modified sealing construction integrated with the ink reservoir;

FIG. 16 is an enlarged fragmentary vertical sectional view of the modified sealing construction, according to FIG. 15 with the ink reservoir being removed from the, barrel;

FIG. 17 is a fragmentary vertical section view of a pen with a modified ink reservoir top;

FIG. l8 is a fragmentary vertical sectional view of a pen with a sealing ring attached to the upper part of the ink reservoir;

FIG. 19 is a fragmentary vertical sectional view of the-pen according to the invention, showing the cleaning wire extension pulled out of corresponding barrel hole seat for'cleaning purposes; and

FIG. 20 is a vertical sectional view of the cleaning wire with modified and plastic-coated upper cleaning wire extension.

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to FIG. 1, pen 10 consists of barrel 12, with an enclosed ink reservoir 14. The ink reservoir 14 is provided with pen nib l6, pen tip 18, cleaning wire 20, cleaning wire extension 22 and vent system 24.

Tubular lower barrel end 26 is by means of screw threads 28 connected with barrel upper part 30, side vent 32 is located in side wall 32 of barrel tube 26.

Barrel tube 2.6 is at its lower end 36 provided with an inner locking shoulder 38, as illustrated in FIGS. 3 and 4-. Ink reservoir 14 is provided with a corresponding notch 40, which notch cooperates with shoulder 38 of barrel tube 26 to provide a removable lock means for the ink reservoir within the barrel.

Protective cap 42 is by means of screw threads 44 screwed onto barrel tube end 26 and has upwardly urged the ink reservoir 14 to the side vent position, illustrated in FIG. 1. Barrel top 30 is provided with carrying clip 31 and a circular inner chamber 46 with an upper seal 48 fitted as at 50 into chamber 46 so as to provide an airtight connection.

By means of protective cap 42, ink reservoir 14 is upwardly urged into barrel 12 sufficiently far so that reservoir top 54 at least is airtight resting against laterally-extending part 56 of seal ring 48 and thereby has sealed off the chamber 46from the outer atmosphere.

As shown in FIG. 5, cap 42 is removed from the barrel 12 so that seal ring 48 acts as a pressure spring, and downwardly has urged the ink reservoir 14 sufficiently far, that reservoir notch 40 is resting upon barrel-locking shoulder 38. Underpart 58 of seal ring 48 thereby does not rest upon ink reservoir top54 and now an air communication is possible between the outer atmosphere and the barrel chamber 46 via lateral vent passage 34 and restricted opening 60 between seal ring 48 and ink reservoir top 54.

Ink reservoir 14 is made of deformable material so that a temporary deformation enables the ink reservoir notch 40 to pass beyond barrel-locking shoulder 38 during its upward movement during assembly, as illustrated in FIG. 6.

As is shown in FIG. 7, a removal of the ink reservoir 14 out of the barrel 12 is also. made. possible by means of a laterally inward deformation of the ink reservoir 14, whereby grooved sidewall portion 62 of the ink reservoir provides a good hold for a finger to also move the ink reservoir downwardly.

In FIG. 8 seal ring 48 with modified profile is shown with its upper end 64 locked in betweenbarrel top 30 and barrel tube 26'. Furthermore, pressure spring 66 which spring is located in chamber 46' provides together with seal ring 48" the required downward force on ink reservoir 14'.

Cleaning wire extension 22,.see FIGS. '1 and 19,protrudes through the vent passage 68-into chamber 46 withits top end 70 removably connected to barrel IOPSOL As ink reservoir 14 is filled with ink 72 ,.shoulder 74 of wire "extension 22. during a hefty shaking of the pen preventsthe escape of big droplets of ink from the'reservoir 14 into vent passage 68and eventually into'chamber46.

Ink collected in vent passage 68 is downwardly urged back into the ink reservoir if by means of an upward displacement of the ink reservoir an air overpressure is built up in chamber 46, so that pressurized air is urged into the inkreservoir through vent passage 68.v

In. FIG. 10-modifiedpen 10" is shown with'sealring'48' located in peripheral groove76 of the ink reservoir 14". Side vent opening 34" thereby is located in the lower end ofba'rrel 12" and is sealed off by means of protective cap 42". This effect is more particularly illustrated in FIGS. l2-14.

After removing cap 42" air circulation to and from chamber 46" is possible through side vent opening 34" and passage 78 above vent 34" and seal ring 48" and between the reservoir 14" and barrel l2" inner wall.

By means of a downward force, applied on the pen, as the pen tip rests upon a writing surface, a relative upward displacement of ink reservoir 14" in barrel 12" is achieved, see FIG. 13, with a complete sealing off of chamber 46" from the outer atmosphere and with air forced into ink reservoir 14 via vent passage 68. Ink, collected in this passage 68 is thus forced downwardly and is suctioned away from the passage by means of capillary ink grooves 80, see FIG. 10.

Barrel 12" has circular locking inner shoulder 38" and seal ring 48" also acts as reservoir guide notch 40" to provide a locking of ink reservoir 14" in barrel 12", as illustrated in FIGS. 12 ad 13.

A removal of this ink reservoir from the barrel 12" is possible by a temporary deformation of seal ring 48", as shown in FIG. 14.

In FIG. 15 modified seal ring 48" is shown, which seal ring is an integral part of the deformable ink reservoir 14" and whereby the ink reservoir is shown in its lowest position with open vent passage 34".

In FIG. 16 a removal of the modified ink reservoir 14" is shown and whereby a temporary deformation of the ink reservoir enables the seal ring 48" to pass downwardly beyond barrel notch 38" In FIG. 17 further modified ink reservoir 14"" is shown with ink reservoir top 54"" attached to the lower end 82 of the ink reservoir by means of screw threads 84.

In FIG. 18 seal ring 48"" is shown as being located in the upper part ofthe ink reservoir.

In FIG. 19 the cleaning wire extension 70 is shown, and in FIG. 20 the cleaning wire extension 22"" is shown and whereby metal reinforcement stem 86 has a plastic coat 88, which coat is integral with shoulder 74 and connector 90 to which connector cleaning wire 20" is attached.

In FIG. 9 pen 10""' is shown with cleaning wire extension 22""'adjacent yet axially displaced from vent 24"". This modification is also possible in the pen, illustrated in FIG. 10.

Iclaim:

l. A stylographic pen with disposable ink reservoir comprisln 1 A. a barrel having an open lower end and defining an inner axial chamber with a first vent extending from said chamber to the outside ofsaid barrel;

B. an ink reservoir reciprocably supported within said barrel and including:

i. a pen nib;

ii. a pen tip extending from said nib;

iii. an ink capillary passage extending from said reservoir through said pen tip; and

iv. a second vent passage extending axially through the top of said reservoir and into said axial chamber;

C. a cleaning wire protruding through the reservoir and into said inner chamber at its upper end and extending through said reservoir and being reciprocable into and out of said ink capillary passage; and

D. a radially inwardly extending shoulder defined at the open end of said barrel so as to complementally engage a corresponding radially outwardly extending shoulder on said reservoir as a lock means; and

E. a seal interposed between said reservoir and said first vent, so as to be closed upon reciprocation of said reservoir upwardly into said barrel and opened upon reciprocation of said reservoir out of said barrel.

2. A stylographic pen with disposable ink reservoir as in claim 1, said barrel first vent passage extending laterally from said axial chamber outwardly of said barrel above the top of said reservoir and a compressible sealing means interposed within said barrel intermediate the top of said reservoir and said lateral vent.

3. A stylographic pen with disposable ink reservoir as in claim 1, said reservoir being of a compressible material such that its radially outwardly extending shoulder may be forced above said radially inwardly extending shoulder of said barrel, as said reservoir is introduced into said barrel.

4. A stylographic pen as in claim 1, said first vent extending laterally through the open end of said barrel so that upon reciprocation of said reservoir within said barrel, said reservoir shoulder engages and axially displaces said seal so as to open first vent for communication between said chamber and the ambient atmosphere.

5. A stylographic pen with disposable ink reservoir as in claim 4, wherein said seal is mounted upon said reservoir for reciprocation with said reservoir into and out ofsaid first vent.

6. A stylographic pen with disposable ink reservoir as in claim 5, wherein said seal is in the form of a ring attached to said reservoir, serving as a guide for said reciprocation of said reservoir within said barrel.

7. A stylographic pen with disposable ink reservoir as in claim 6, wherein said seal acts simultaneously as a locking guide, abutting said radially inwardly extending shoulder of said barrel.

8. A stylographic pen with disposable ink reservoir as in claim 3, wherein said ink reservoir has a removable top, so as to enable refilling with ink when said reservoir is removed from said barrel.

9. A stylographic pen with disposable ink reservoir as in claim 3, wherein said cleaning wire extends through an opening adjacent said vent in the top ofsaid reservoir.

10. A stylographic pen with disposable ink reservoir as in claim 9, wherein a portion of said cleaning wire extending ink said reservoir is plastic coated.

11. A stylographic pen with disposable ink reservoir as in claim 10, said cleaning wire at its upper end being seated in said barrel above said chamber and first vent.

12. A stylographic pen with disposable ink reservoir as in claim 11, including spring-pressurized means interposed between said chamber and said reservoir, urging said barrel to downward vent-open position. 

1. A stylographic pen with disposable ink reservoir comprising: A. a barrel having an open lower end and defining an inner axial chamber with a first vent extending from said chamber to the outside of said barrel; B. an ink reservoir reciprocably supported within said barrel and including: i. a pen nib; ii. a pen tip extending from said nib; iii. an ink capillary passage extending from said reservoir through said pen tip; and iv. a second vent passage extending axially through the top of said reservoir and into said axial chamber; C. a cleaning wire protruding through the reservoir and into said inner chamber at its upper end and extending through said reservoir and being reciprocable into and out of said ink capillary passage; and D. a radially inwardly extending shoulder defined at the open end of said barrel so as to complementally engage a corresponding radially outwardly extending shoulder on said reservoir as a lock means; and E. a seal interposed between said reservoir and said first vent, so as to be closed upon reciprocation of said reservoir upwardly into said barrel and opened upon reciprocation of said reservoir out of said barrel.
 2. A stylographic pen with disposable ink reservoir as in claim 1, said barrel first vent passage extending laterally from said axial chamber outwardly of said barrel above the top of said reservoir and a compressible sealing means interposed within said barrel intermediate the top of said reservoir and said lateral vent.
 3. A stylographic pen with disposable ink reservoir as in claim 1, said reservoir being of a compressible material such that its radially outwardly extending shoulder may be forced above said radially inwardly extending shoulder of said barrel, as said reservoir is introduced into said barrel.
 4. A stylographic pen as in claim 1, said first vent extending laterally through the open end of said barrel so that upon reciprocation of said reservoir within said barrel, said reservoir shoulder engages and axially displaces said seal so as to open first vent for communication between said chamber and the ambient atmosphere.
 5. A stylographic pen with disposable ink reservoir as in claim 4, wherein said seal is mounted upon said reservoir for reciprocation with said reservoir into and out of said first vent.
 6. A stylographic pen with disposable ink reservoir as in claim 5, wherein said seal is in the form of a ring attached to said reservoir, serving as a guide for said reciprocation of said reservoir within said barrel.
 7. A stylographic pen with disposable ink reservoir as in claim 6, wherein said seal acts simultaneously as a locking guide, abutting said radially inwardly extending shoulder of said barrel.
 8. A stylographic pen with disposable ink reservoir as in claim 3, wherein said ink reservoir has a removable top, so as to enable refilling with ink when said reservoir is removed from said barrel.
 9. A stylographic pen with disposable ink reservoir as in claim 3, wherein said cleaning wire extends through an opening adjacent said vent in the top of said reservoir.
 10. A stylographic pen with disposable ink reservoir as in claim 9, wherein a portion of said cleaning wire extending ink said reservoir is plastic coated.
 11. a stylographic pen with disposable ink reservoir as in claim 10, said cleaning wire at its upper end being seated in said barrel above said chamber and first vent.
 12. A stylographic pen with disposable ink reservoir as in claim 11, including spring-pressurized means interposed between said chamber and said reservoir, urging said barrel to downward vent-open position. 